Pseudo-orthorhombic
WebJan 23, 2003 · This pseudotranslational symmetry should enable the true orthorhombic cell to be inferred and it can be characterized in a Patterson synthesis. In orthorhombic and … http://www.ccspublishing.org.cn/article/doi/10.1016/j.cclet.2024.12.019
Pseudo-orthorhombic
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WebOct 1, 2024 · It crystallizes in the orthorhombic system (space group C 222) [ 1] but shows a strong pseudo-hexagonal symmetry around the Ca-SO 4 - chains which has led to its description in various space groups. β -anhydrite was first identified as “anhydrous sulfated lime” ( chaux sulfatée anhydre) in 1801 by R.-J. Haüy who wrote “Its mechanical division, … WebFeb 8, 2013 · The big difference in the magnetic anisotropy of these two SrRuO 3 phases was shown to be closely linked to their respective RuO 6 octahedral rotation patterns: the RuO 6 octahedra rotate differently along the two orthogonal in-plane directions in the pseudo-orthorhombic phase, whereas in the tetragonal phase only octahedral rotations …
Web2 Minute Read. Home Gemstones Painite Value, Price, and Jewelry Information. By Joel E. Arem, Ph.D., FGA, International Gem Society. Until 2001, only three painite crystals were known to exist. Since then, additional discoveries have produced many more specimens of this deep red gemstone, but facetable material remains very rare. WebDec 1, 2000 · The crystal structure of the low temperature oxidized form of Sr 3.94 Ca 1.31 Bi 2.70 O 12 has been determined using a combined Rietveld refinement technique with neutron, synchrotron, and powder x-ray diffraction data. The structure is pseudo-orthorhombic, and systematic absences indicated the structure to be monoclinic with …
WebNov 24, 2015 · Based on recent studies of Keeble et al. ; the orthorhombic O-phase found in BCTZ50 close to ambient temperature seems to be absent in BCTZ3 (from dielectric and pyroelectric measurements). Consequently, BCTZ3 is far away from the phase convergence region already reported for BTZ-BCT pseudo-binary phase diagram and no instability … WebDec 19, 2000 · The crystal structure of Bi 2 (Zn 1/3 Nb 2/3) 2 O 7 thin films was dependent on the firing temperature; the films showed the cubic pyrochlore phase at temperatures below 650 °C, and a pseudo-orthorhombic pyrochlore structure at 750 °C. A mixture of cubic and pseudo-orthorhombic structures was found in thin films crystallized at 700 °C.
WebJan 19, 2007 · In addition to the known cubic and orthorhombic structures observed at atmospheric pressure, we find two polymeric states with pseudocubic and pseudoorthorhombic structures, respectively, based on the two original lattices and created by heating in different pressure ranges.
Web1. I personally think the introduction of the pseudo-cubic unit cell is for the purpose of better reflecting the phase transition. For example, when you have cubic to orthorhombic … total number of popesWebThe pseudo-orthorhombic and monoclinic unit cells were related by the following vector operations: a(m) = b(o) - c(o), b(m) = a(o) and c(m) = -2c(o) - b(o). The pseudo-orthorhombic subset of data produced good SAD phases, leading to structure determination with one monomer in the asymmetric unit. Subsequently, the structure of the Mac-1 mutant ... total number of population in indiaStilbite is usually monoclinic 2/m, meaning that it has one twofold axis of rotational symmetry perpendicular to a mirror plane. The twofold axis is the crystal axis b, and the a and c crystal axes lie in the mirror plane. For a monoclinic crystal a and c are inclined to each other at an angle β which is not a right angle. For stilbite β is nearly 130°. Stilbite crystals, however, appear to be almost orthorhombic, and a larger unit cell can be chosen, containing two formula units (Z = 2) su… total number of prime numbers from 1 to 1000